Ajax Products Editor error: Call to undefined function getLicenseKeyAddon()

Ajax Products Editor plugin error: Call to undefined function getLicenseKeyAddon()

Hello! I installed the plugin Ajax Products Editor from folder and activated for System -> Manage -> Extensions.

Now I am going to Components -> JoomShoping -> Products and getting this error "An error has occurred. Call to undefined function getLicenseKeyAddon()".

Joomla version - 4.3.4
JoomShoping version - 5.2.1
Ajax Products Editor plugin version - 2.0.4

How can I solve that issue?

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Aw: Ajax Products Editor error: Call to undefined function getLicenseKeyAddon()

1. For installation
Use JoomShopping / Install & Update
https://www.joomshopping.com/forum/posts/7/1586.html

2. For (Joomshopping 5.0.0+)
Install
Admin Ajax Products Editor 3.0.4
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Admin Ajax Products Editor 2.0.4 - For old JoomShopping 4.x